Gas-burner



B. L. SHANNON.

GAS BURNER.

APPLlpATloN FILED Nov. 13, 1918.

1,337,801 4Patented Apr. 20, 1920.

BAKER I.. SHANNON, or HEALToN, OKLAHOMA.

GAS-BURN ER.

Application led November 13, 1918. Serial No.

T0 all whom it may concern:

Be it known that I, BAKER L. SHANNON', a citizen of the United States, residing at Healton, in the' county of Carter, State of Oklahoma, have invented certain new and useful Improvements in Gas-Burners; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to gas burners and more particularly to the class of injector.

burners wherein steam under pressure is employed for injecting a mixture of steam, gas and air into a re-box.

I am aware that it is not new to provide a mixing tube into which is delivered a steam jet which serves to draw gas and air through side openings of the tube and after mixing with them to throw them from the tube in condition for combustion. It is the object of the present invention to provide a specific embodiment of this idea such as will get efficient results by properly proportioning the gas and air, irrespective of the head or pressure under which the gas is fed to the mixing tube and whether or not it has any head or pressure whatsoever.

1n the drawings:

Figure 1 is a side elevation of the burner.

Fig. 2 is a central section longitudinally of the mixing tube and in a plane including the axes of the gas, steam and air inlets.

Fig. 3 is a transverse section including the air inlet.

Fig. 4 is a plan view of the rear end portion of the mixing tube, showing the arrangement of the air regulating slide.

Fig. 5 is a view similar to Fig. 4 with the air slide removed.

Referring now to the drawings, the present burner comprises a cylindrical mixing tube 10 having one end freely open for passage of the combustible mixture therefrom while at the opposite end is a wall 11. Centrally of the wall 11 is a threaded opening 12 in which is screwed the enlarged rear end portion 13 of an injecting pipe 14l which extends axially of the mixing tube and at its opposite end, which is directed toward the outlet end of the tube, is reduced in diameter and provided with an outlet orice 15. The enlarged portion 13 of the pipe 14 is internally threaded for connection of a steam supply pipe 16 thereto.

Specification of Letters Patent.

Patented Apr. 20, 1920.

The length of the mixing tube is five and one-third diameters, while the orifice 15 Vis disposed just beyond a point two diameters from the rear end wall 11. Through one side of the wall of the tube 10 is formed a boss 17 provided with an opening 18 and into this boss and opening 1s screwed a gas inlet pipe 19. This gas inlet has a diameter twothirds of that of the mixing tube and its foremost point is located two mixing tube diameters froin the wall 11 so that it is traversed by the steam pipe 14 which opens forwardly therebeyond. In that portion of the wall of the mixing tube opposite to the gas inlet opening 17 is formed an air inlet opening 2O having a diameter half that of the gas inlet opening and located with its foremost point half way be tween the wall 11 and the rea-rmost point of the gas inlet. A a In order to regulate air feed through the inlet 20, a cut-off slide 21 is provided, the side margins of which slide between the outer face of the tube 10 and guide plates 22 portions of which overlie the slide or valve plate 21 while other portions are offset and secured to the wall of the tube. As illustrated, the valve plate 21 has one end turned upwardly as shown at 23 and provided with a threaded perforation 24 to receive a feed screw 25 which is loosely mounted in a bearing member 26 secured to the rear wall 114 and projecting beyond the periphery of the tube 10. The unthreaded shank of the screw 25 engages this bearing and is held against longitudinal movement therein by means of collars 27 fixed to the shank. A hand wheel 2S upon the shank of the screw serves to rotate it in either direction to effect a corresponding feed of the valve plate 21 with respect to the air inlet 20. To effect a nicety of adjustment of the air valve, it has a V-shaped notch opening through its free end and as the plate is drawn rearwardly, this notch, beginning with its apex, is moved into registration with the inlet opening 20 so that the farther it is moved the more rapid the rate of increase of the effective inlet.

It is found in practice, that in the use of this particular positional relation of the steam, gas and air inlets, a proper proportion of gas will be insured, even when there is little or no gas pressure or head. The positioning of the gas inlet nearer to the orifice vides against the possibility of too thin a mixture to support combustion. There is thus avoided an extinguishing of the flame in the fire-box With a subsequent accumulation of a lean mixture to subsequently explode When there is added to it a richer mixture before reignition at the mouth of the burner canbe effected. I

Vhat is claimed is: l

l. An injector burner comprising a mixing tube, a steam pipe entering through the rear end Wall of the tube, a gas inlet opening through one side of the tube, an air inlet opening through the opposite side of the tube in rear of the gasinlet, a plate mounted slidably on the tube and having a V-shaped notch disposed to register, apex first, with the air inlet When the slide is moved from the latter, and means for adjusting the plate.

Y i 2. An injector burner comprising a mixing tube, a steam pipe entering through the rear end of the mixing tube axially thereof and having an outlet disposed in the direction of the outlet of the mixing tube, a gas inlet opening through the side of the mixing tube with its greatest forward extension just to the rear of the plane touched by the outlet orifice of the steam pipe, an air inlet in the oppositev Wall of the tube Withits foremost Y point midwaybetweenthe rearmost point of the gas inlet and theV rear Wall of the mixing tube, guides at opposite sidesof the air inlet opening, `a plate moimted slidably in the guides and having a notch disposed to regis,- ter, apex iirst, With the air inletjWhen the slide is moved from the latter, and means for reciprocating the slide. Y

In testimony whereof, I affix my signature, in the presence of two Witnesses. Y

BAKER L. SHANNON.

Witnesses:

RALPH A. LxND, JOHN P. HERR. 

